SaaS Metrics Calculator: MRR, ARR, LTV, CAC, Churn and More

Your details

Total number of active paying customers right now.
Average monthly recurring revenue per customer (ACV divided by 12 for annual plans).
$
Revenue minus cost of goods sold (hosting, support, infrastructure) as a percentage of revenue. SaaS median is 70-80%.
%
Net new customers added per month as a percentage of existing customers.
%
Total monthly opex including salaries, marketing, infrastructure and G&A. Used for Rule of 40 and burn rate.
$
Percentage of customers who cancel each month. B2B SaaS benchmark: under 2% per month (under 22% annualised).
%
Upsell and cross-sell revenue added each month as a percentage of your current MRR. Used to calculate net revenue retention.
% of MRR
Total sales and marketing spend to acquire one new customer (total S&M spend divided by new customers added in the period).
$
Currency
Monthly Recurring Revenue (MRR)Excellent efficiency
$30,000.00

Predictable monthly subscription revenue

Annual Recurring Revenue (ARR)$360,000.00
Customer Lifetime Value (LTV)$5,625.00
LTV:CAC Ratio11.25x
CAC Payback Period4.4months
Annual Churn Rate21.5%
Net Revenue Retention (NRR)101%
Rule of 40 Score112.9%
SaaS Magic Number1.69
Monthly Net Burn-$10,000.00
Avg Customer Lifetime50months
11.25 x
Unsustainable<1Borderline1-3Healthy3-5Outstanding5+

Your ARR is $360,000 with an LTV:CAC ratio of 11.3x.

  • Your LTV:CAC ratio of 11.3x is at or above the 3x benchmark, meaning each customer returns at least 3x their acquisition cost.
  • Net revenue retention of 101% means your existing customers generate more revenue over time, even without new sales.
  • Your Rule of 40 score of 113% clears the 40% threshold investors use to screen for efficient SaaS businesses.
  • Annual churn of 21.5% is high. At this rate, you replace your entire customer base in under 4.6 years, which makes growth very expensive.

Next stepA CAC payback of 4 months is healthy. Most growth-stage SaaS businesses target under 18 months, and best-in-class companies recover CAC in under 12 months.

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